"Justin Bieber's Instagram is making me uncomfortable," the actress had written.

Speaking to E! Online, Dennings explained that she was disturbed by the amount of shirtless photos Bieber uploaded on the site.

"I would like to clear up what I said about Justin Bieber's Instagram," Dennings said. "Here's the deal. I said that about his Instagram because there's so many shirtless pictures, and I feel like he's too young to be posting shirtless pictures! I mean good for you, you've got that side stuff and you're real youngâ€¦"

Her co-star Beth Behrs added that she found Bieber "so cute when he was little".

"I don't think [the writing] became more tame at all. I do think people kind of got over it. We said [vagina] a lot in one episode called 'Vagina Bed' and maybe they were desensitised to it after that and then they weren't shocked by it any moreâ€¦ It's not a big deal."